From 37cf19f94f7983bd7b349f106633bdaff3bdd815 Mon Sep 17 00:00:00 2001
From: Giulio rebuffo <giulio.rebuffo@gmail.com>
Date: Sun, 19 Jan 2025 19:37:38 +0100
Subject: [PATCH] Caplin: fixed remote DOS (#13482)

added circuit breaker if too many iterations are performed
---
 cl/sentinel/handlers/blobs.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cl/sentinel/handlers/blobs.go b/cl/sentinel/handlers/blobs.go
index bb08589cda9..e1165fca815 100644
--- a/cl/sentinel/handlers/blobs.go
+++ b/cl/sentinel/handlers/blobs.go
@@ -51,7 +51,13 @@ func (c *ConsensusHandlers) blobsSidecarsByRangeHandler(s network.Stream, versio
 	defer tx.Rollback()
 
 	written := 0
+	maxIter := 32
+	currIter := 0
 	for slot := req.StartSlot; slot < req.StartSlot+req.Count; slot++ {
+		if currIter >= maxIter {
+			break
+		}
+		currIter++
 		blockRoot, err := beacon_indicies.ReadCanonicalBlockRoot(tx, slot)
 		if err != nil {
 			return err